›› 2007, Vol. 28 ›› Issue (4): 663-669.

• 基础理论与实验研究 • 上一篇    下一篇

巷道开挖围岩能量释放与偏应力应变能生成的分析计算

潘 岳,王志强,吴敏应   

  1. 青岛理工大学 土木工程学院,青岛 266520
  • 收稿日期:2005-05-25 出版日期:2007-04-10 发布日期:2013-09-05
  • 作者简介:潘岳,男,1947年生,教授,从事岩土力学面的研究工作
  • 基金资助:

    山东省自然科学基金(Y2002-A03)资助项目,山东省教委重点资助项目(G04D15)

Analysis and calculation of energy release and deviatoric stress energy generation of surrounding rock in tunnel excavation process

PAN Yue, WANG Zhi-qiang, WU Min-ying   

  1. College of Civil Engineering, Qingdao Technological University, Qingdao 266520, China
  • Received:2005-05-25 Online:2007-04-10 Published:2013-09-05

摘要: 巷道开挖,围岩能量释放,同时在围岩中产生偏应力。围岩应力是原岩应力与偏应力的叠加,偏应力或偏应力能控制岩体破坏。在静水压力 和岩体体积应变为0的条件下,利用文[1]在弹性、非线性软化本构模型导得的巷道围岩应力分布表达式,用重积分计算了围岩弹性区和软化区中的偏应力应变能 ,证明了 可以简捷地用地应力 关于巷壁位移 做一次积分再乘巷壁周长的途径来得到,阐述了该计算途径的原理。巷道开挖过程围岩释放的能量等于围岩压力 关于 的积分乘巷壁周长。由此,可通过 ~ 曲线、 ~ 曲线所围面积的几何形式,表示围岩偏应力能、围岩弹性能释放量随 变化的情况。所得研究结果可以深化围岩由于开挖产生的力学响应及挖成后围岩工况规律的认识。

关键词: 巷、隧道, 巷壁位移, 围岩压力, 围岩能量释放, 偏应力应变能

Abstract: Surrounding rock energy is released in company with tunnel excavation; and in the meantime deviatoric stress is brought in surrounding rock. Surrounding rock stress is the superposition of stress in virgin rock mass and deviatoric stress. The deviatoric stress or its strain energy dominates the breakage of rock mass. On condition that the hydrostatic pressure and the volumetric strain of rock mass is equal to zero, by using the stress distribution expressions of surrounding rock which are educed on base of the constitutive model that its elastic and nonlinear softening segment linked glossily in paper [1], and using multiple integral, the strain energy of deviatoric stress, , is calculated in the elastic and softened zones of surrounding rock. It is proved that can be deduced concisely by way of integrating the ground stress with respect to the displacement of tunnel wall , and multiplying by perimeter of tunnel wall, and the principle of the calculation approach of is expatiated. The energy released by surrounding rock in the process of tunnel excavation is equal to the product of perimeter of tunnel wall and the integral of the surrounding rock pressure with respect to . Thereby, the circumstances of deviatoric stress energy and the released elastic energy in surrounding rock in response to can be expressed by the geometrical form that the area enclosed by the curves - and - . The acquired findings can deepen the understanding of mechanical response of surrounding rock owing to tunnel excavation and operating condition of surrounding rock after tunnel excavation.

Key words: tunnel, displacement of tunnel wall, surrounding rock pressure, energy release of surrounding rock, strain energy of deviatoric stress

中图分类号: 

  • TD 322+ .4
[1] 孙明社,马 涛,申志军,吴 旭,王梦恕,. 复合式衬砌结构中衬砌分担围岩压力比例的研究[J]. , 2018, 39(S1): 437-445.
[2] 张治国,徐晓洋,赵其华,. 水平地震力作用下浅埋偏压隧道围岩压力的简化理论分析[J]. , 2016, 37(S2): 16-24.
[3] 刘仰鹏,贺少辉,汪大海,李丹煜. 超大跨度深埋地下结构围岩压力计算研究[J]. , 2015, 36(S2): 118-124.
[4] 张俊儒 ,孙克国 ,卢 锋 ,郑宗溪 ,孙其清,. 不等跨连拱铁路隧道围岩压力分布及受力特征模型试验研究[J]. , 2015, 36(11): 3077-3084.
[5] 王志伟 ,乔春生 ,宋超业,. 上软下硬岩质地层浅埋大跨隧道松动压力计算[J]. , 2014, 35(8): 2342-2352.
[6] 刘成禹,何满潮,. 深埋隧道地质构造发育段围岩压力的特点[J]. , 2014, 35(4): 1101-1109.
[7] 何本国 ,朱永全 ,孙明磊 ,张志强 ,孙元国 . 高速铁路膏溶角砾岩深埋隧道支护荷载确定方法[J]. , 2013, 34(3): 827-832.
[8] 李文培,王明洋,范鹏贤. 基于间断位移场的隧道围岩承载能力研究[J]. , 2010, 31(8): 2441-2447.
[9] 潘 岳,王志强,吴敏应. 非线性硬化与非线性软化的巷、隧道围岩塑性分析[J]. , 2006, 27(7): 1038-1042.
[10] 潘 岳,撒占友,贺可强. 巷道围岩状态的等效应力等效应变表述[J]. , 2005, 26(11): 1695-1699.
[11] 潘 岳,王志强. 应变非线性软化的圆形硐室围岩荷载-位移关系研究[J]. , 2004, 25(10): 1515-1521.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] 崔 凯,谌文武,张景科,韩文峰,梁收运. 多元层状边坡土体风蚀速率与微结构参数关系[J]. , 2009, 30(9): 2741 -2746 .
[2] 谈云志,孔令伟,郭爱国,冯 欣,万 智. 红黏土路基填筑压实度控制指标探讨[J]. , 2010, 31(3): 851 -855 .
[3] 荚颖,唐小微,栾茂田. 砂土液化变形的有限元-无网格耦合方法[J]. , 2010, 31(8): 2643 -2647 .
[4] 胡明鉴,汪 稔,陈中学,王志兵. 泥石流启动过程PFC数值模拟[J]. , 2010, 31(S1): 394 -397 .
[5] 李术才,徐帮树,丁万涛,张庆松. 海底隧道最小岩石覆盖厚度的权函数法[J]. , 2009, 30(4): 989 -996 .
[6] 张军辉. 不同软基处理方式下高速公路加宽工程变形特性分析[J]. , 2011, 32(4): 1216 -1222 .
[7] 王亮清,P.H.S.W. Kulatilake,唐辉明,梁 烨,吴 琼. 双临空面岩质边坡滑动与倾倒破坏的运动学分析[J]. , 2011, 32(S1): 72 -77 .
[8] 李 旭,张利民,敖国栋. 失水过程孔隙结构、孔隙比、含水率变化规律[J]. , 2011, 32(S1): 100 -105 .
[9] 邓华锋,李建林,刘 杰,朱 敏,郭 靖,鲁 涛. 考虑裂隙水压力的岩体压剪裂纹扩展规律研究[J]. , 2011, 32(S1): 297 -0302 .
[10] 姜世平 ,芮筱亭 ,洪 俊 ,戎 保 ,刘志军. 散粒体系统动力学仿真[J]. , 2011, 32(8): 2529 -2532 .